I can't not sing along if I know the lyrics

That could be a problem if your version of the lyrics don't quite match what the person on stage is singing. The artist's interpretation of the tune may also differ fromt what might be expected.

For me, singing along is best limited to choruses and the artists should be allowed to sing it first on their own, then the audience should try to follow that version. I always enjoy it when the singer invites the audience to sing along.

DC